Minerals must be _____.

Answers

Answer 1

Answer:

Minerals must have a definite chemical composition which may differ within specified limits. According to geologists minerals must be:

>naturally occurring-meaning, people did not make it.
>inorganic- means not made by an organism
>solid-not a liquid, not a gas at standard temperature and or pressure
>definite chemical composition- all occurrences have a chemical composition which varies within a specific limited range.
>ordered internal structure- meaning, atoms are arranged in a systematic and repeating pattern.

Answer 2

Answer:

Answer: Minerals must be homogenous.

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Describe the role of electrons in the formation of a covalent bond

Answers

electrons are shared between the non-metallic atoms

How is a delta formed

Answers

When a river reaches a lake or the sea the water slows down and loses the power to carry sediment . The sediment is dropped at the mouth of the river. Some rivers drop so much sediment that waves and tides can't carry it all away. It builds up in layersforming a delta.

Which of the following is found in a animal cell , but not in a plant cell?A-nuclei
B-centrioles
C-mitochodria
D-central vacuole

Answers

The centrosome is present outside the nucleus in an animal cell. It is the structure that contains centrioles. These are the structures that are essential during cell division. The plant cells lack centrioles and are able to divide in their absence.

Further Explanation:

The centrioles are present particularly in animal cells and are located within the centrosome which is present near the nucleus. The centrosome is a granular mass that acts as a center for microtubules. The centrioles are two in numbers and are positioned at the right angle with respect to each other. Each centriole is composed of microtubules forming nine bundles that are arranged in a ring formation.

In an animal cell during interphase, the components of the centrosome along with the centrioles are doubled. Initially, the duplicated pairs of centrioles remain close to each other but with the initiation of mitosis, the pairs tend to separate and get located in the newly formed microtubule-organizing centers. The microtubules are radiated through these centers in the star-shaped clusters called asters. With the movement of asters towards the opposite poles, the microtubules span the cell attaining a spindle-shaped formation. The spindle fibers help in the alignment of chromosomes during their separation at the time of cell division.

In animal cells, centrioles are important for mitosis to take place whereas reproduction in plant cells can occur even without centrioles. The presence of centrioles in animal cells has made mitosis an efficient and error-free process while its absence results in divisional errors and also delays the mitotic process.

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Answer Details:

Grade: High School

Chapter: The Cell

Subject: Biology

Keywords:

Cell, centrosome, centriole, granular mass, microtubules, interphase, duplication, cell division, mitosis, spindle formation, asters, microtubule organizing center, chromosomes, reproduction, animal cell, plant cell.

The answer is C. Hope it helps! :)

In which organelle does the chemical process of photosynthesis occur? mitochondria nucleus
chloroplast
endoplasmic
reticulum

Answers

chloroplast, in the plant cell the chloroplast is where photosynthesis takes place

I believe the process occurs in the Chloroplast

Read the situation and answer the questions that follow. Imagine that a friend asks you for investment advice. He has $10,000 to invest and he has about 35 years before he will be ready for his financial goal of early retirement.
1. What type of investment would you recommended to your friend? Why?
2. What other investing advice would you give him to help him achieve his financial goals?

Answers

1. The type of investment that I would recommend to my friend would be mutual funds because it's good for long term goals such as retirement. Mutual funds are more convenient because it allows my friend's money for $10,000 to be invested in different avenues such as stocks, bonds, money market and others. The fund manager's goal is get capital gains and income for the investor or in this case, my friend.
2. He can also invest his money by buying life insurances that can include health protection. He can also buy a house or a condominium and have it rented. Insurances nowadays give you the option to withdraw your invested money and as for the real estate investment, even if you retire, you can additional income.

What is the first step to take to help reduce pollution?

Answers

the answer would be to gain information about the current state of environment and ways to inprove it.

Stop littering on the ground , instead of recycling trash or burning it, shoot it into space far away from the milky way , or just stop making factories , that pollutes the earths air.

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What would most likely occur if an experimental design specifies only a test group?a)The experiment will lack a control.b)The experiment will lack a purpose.c)The experiment will not be repeatable.d)The experiment will not have variables.